關鍵字： 番石榴；珍珠菝；化學肥料；有機肥料；組成份；水心病；Psidium guajava L.；Guava；Jen Ju Bar；Chemical fertilizer；Organic fertilizer；Composition；Watercore symptom
摘要： 在不同肥培管理下的珍珠菝番石榴，果實採樣後經官能品評，依優劣區分為A至D四個等級，調查各等級果實比例並分析果肉成分差異。結果顯示，單施用化學肥料之栽培方式所生產之果實無A等級，而C等級約佔總採收量的65%；施用有機肥枓為主的栽培方式，A等級佔10%，B等級佔56%。成分分析顯示，施用有機肥料為主的管理方式，其果實的維生素C、總醣、可滴定酸度的含量，平均比單施化學肥料為高；而粗纖維及草酸含量則較低。施用有機質肥料栽培的果實，果肉有水浸狀情形發生。水浸狀果肉之蔗糖、檸檬酸及可滴定酸度含量明顯高於A等級果實，但果糖含量則遠低於A等級果實。'Jen Ju Bar' guava fruit cultivated with different fertilizers were separated into four grades (A to D) according to sensory evaluation and the content of various compounds of fruit flesh. The proportion of C grade product of the guava fruit 'Jen Ju Bar' cultivated only with chemical fertilizers was 65% and that of A grade was absent. Whereas, the A grade was 10% and B grade was 56% for fruits produced by plants cultivated with organic fertilizers. Meanwhile, the content of ascorbic acid, total sugar, and titratable acidity of the fruit cultivated with organic fertilizers was much higher than those cultivated with chemical fertilizers. However, the crude fiber and oxalic acid content of the former were lower than those of the latter. Some of the guava fruit cultivated with organic fertilizers appeared watercore symptoms. The contents of sucrose, organic acids and titratable acidity of watercore flesh part were significantly higher than the A grade guava, but fructose content was lower than the normal fruit.